I'm not mechanically minded ( never have been) but now I'm a Sandman owner I realize that I'll always be learning stuff about these vehicles. This is the only place I know where you can , with confidence, have a question nutted out. Even if the answer changes back and forth along the way in the end the correct answer is found.
So, a 4.2L engine from the 70's . Should the oil filler cap be on the passenger or drivers side if the seller is claiming all is original and I can't get to see tags or engine No.